I think this only applies if the two actions occupy the same space, and change when pressed? If I saw a separate play and pause button, I’d assume play means play and pause meant pause. If I saw only one button for play, I’d probably assume it was currently paused/stopped.

D3, B12, folate and iron

Spark on both Android and Win. The AI integration is surprisingly useful, albeit I think a paid feature. I also personally like the look of the clients and they are pretty fully featured.